Process for fabricating a zirconium-niobium alloy and articles r

Details Process for fabricating a zirconium-niobium alloy and articles r Process for fabricating a zirconium-niobium alloy and articles r

1985-01-22

1987-03-10

Rutledge, L. Dewayne

Alloys or metallic compositions

Zirconium or hafnium base

148 115F, 148407, 148421, C22C 1600

Patent

active

046490230

ABSTRACT:
Articles, such as tubing, which have excellent corrosion resistance to steam at elevated temperatures and to hydriding, are produced from zirconium alloys containing 0.5 to 2.0 percent niobium, up to 1.5 percent tin, and up to 0.25 percent of a third alloying element such as iron, chromium, molybdenum, vanadium, copper, nickel and tungsten. The articles are formed by beta-treating the alloy, initially deforming the same at a temperature below 650.degree. C. and further deforming the same through cold working stages also below 650.degree. C., annealing the material between the cold working stages at a temperature between 500.degree.-650.degree. C., and final annealing the same at a temperature below 650.degree. C. to provide articles having a microstructure of fine precipitates of less than about 800 .ANG., homogeneously dispersed throughout the zirconium.

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